It would definitely be a conversation they were going to have later.
FP put his hand on Fred's shoulder. "I don't trust her either but we need to know for sure that she says who she says she is. After that we can decide how much of a threat she may be." He still wasn't sure if he believed that she wasn't after his title.
At Chelsea's comment, FP shook his head, turning to lead the way to the back to hide the grin on his face. Something told him that he didn't need the test to confirm that she was his sister. There was so much in her that was similar to himself.
When they were all in the office, FP started rolling up his sleeve. "Fred, I think you should let her do this. She's trained and knows what she's doing." If Fred was determined to not let her near him, then FP would give in and let Fred do the blood draw but he hoped that his friend would see reason.